nixos SKILL.md skillA
nixos from iuliandita/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add iuliandita/skills/nixos@git:20261028.a4222b4Pins git:20261028.a4222b4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- iuliandita/skills
- Path
skills/nixos/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261028.a4222b4, committed Oct 28, 2026
- First version recorded
- Sep 20, 2026
- Size
- 27,185 bytes
- Repository stars
- 11
- License
- MIT
Administer NixOS and Nix: flakes, Home Manager, nix-darwin, generations, overlays, and declarative configuration.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# NixOS, Nix, and Flakes Administration Administer NixOS without falling back into imperative distro muscle memory. NixOS is declarative, functional, and atomic: the system is a value computed from a configuration, every change becomes a new immutable generation in `/nix/store`, and rollbacks are a bootloader entry away. This skill keeps that model intact, then layers in the practical stack: channels vs flakes, `nixos-rebuild` vs `nix` CLI, home-manager, nix-darwin, store hygiene, overlays, module writing, secrets, and the Determinate Nix and Lix lanes. The places NixOS breaks are NixOS-shaped: channel drift, flake input staleness, garbage collection that nukes a needed derivation, overlays fighting, `nix-env -i` poisoning the user profile, hardware modules missing, or people treating `/etc/nixos/configuration.nix` like a normal Linux config file. **Why people run it.** Atomic upgrades and rollbacks, bit-for-bit reproducible systems, disposable dev shells, fleet-wide configuration without a separate config-management tool, and a single language for a workstation, a server, a container image, a NixOS VM, and a macOS laptop via nix-darwin. …
Read the whole file at its exact version.
How to install
mdr add iuliandita/skills/nixos@sha256:a2a3af466a011adfThe line at the top of this page pins the label git:20261028.a4222b4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_dvpacohv3rscchk5)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 20, 2026 and Oct 28, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261028.a4222b4 latest | 2026-10-28 | a4222b4 | 27,185 B | A | view · diff |
| git:20261003.496420b | 2026-10-03 | 496420b | 27,100 B | A | view · diff |
| git:20261002.a7f9a1c | 2026-10-02 | a7f9a1c | 28,152 B | A | view · diff |
| git:20260924.557fa89 | 2026-09-24 | 557fa89 | 28,096 B | A | view · diff |
| git:20260920.ac01853 | 2026-09-20 | ac01853 | 27,992 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (27185 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
iuliandita/skills · 11 stars · license MIT · pushed 2026-11-05 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_dvpacohv3rscchk5 GET https://markdownregistry.com/api/v1/resolve?ref=iuliandita/skills/nixos GET https://markdownregistry.com/api/v1/blob/a2a3af466a011adf178bdd5f2f112c69b996efc13f17234df0b25df66794a1b2
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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